Blueberry Sour Cream Coffee Cake

1/4 cup butter (2 oz)
1 cup sugar
2 eggs
1 1/4 cup sour cream
1 tsp vanilla
2 cups flour
2 tsp baking powder
1 tsp baking soda
½ tsp salt
2 cups frozen blueberries (tossed with flour)

Topping
1/3 cup sugar
1 tbl. Cinnamon

Cream together butter and sugar. Add eggs, sour cream and vanilla. All flour, baking powder, baking soda, and salt. Mix. Add blueberries. Make topping. Grease and flour bundt pan. Spoon ½ of batter into pan. Top with ½ topping. Add remaining batter and top with topping. Bake in 350 degree oven 50 minutes.